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Question 1 of 10
1. Question
Choose the correct statement which does not apply to the order of a reaction?
Correct
The stoichiometric coefficient of the reactants doesn’t have an effect on the order. Order of response is the sum of energy to specific the rate of response to the concentration terms of the reactants. Order can handiest be assessed experimentally.
Incorrect
The stoichiometric coefficient of the reactants doesn’t have an effect on the order. Order of response is the sum of energy to specific the rate of response to the concentration terms of the reactants. Order can handiest be assessed experimentally.
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Question 2 of 10
2. Question
For a reversible adiabatic process, the change in entropy is?
Correct
Adiabatic procedures are characterized through growth in entropy, or degree of ailment if they may be irreversible and through no change in entropy if they may be reversible. Adiabatic procedures can’t lower entropy.
Incorrect
Adiabatic procedures are characterized through growth in entropy, or degree of ailment if they may be irreversible and through no change in entropy if they may be reversible. Adiabatic procedures can’t lower entropy.
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Question 3 of 10
3. Question
According to the Gibbs free energy the process is nonspontaneous when?
Correct
The calculation of Gibbs free energy entails each enthalpy and entropy values for a system. The change withinside the Gibbs feature determines whether or not a technique is spontaneous or nonspontaneous. When the change in Gibbs function is negative, the process is spontaneous, however, while the change in Gibbs function is positive, the process is nonspontaneous.
Incorrect
The calculation of Gibbs free energy entails each enthalpy and entropy values for a system. The change withinside the Gibbs feature determines whether or not a technique is spontaneous or nonspontaneous. When the change in Gibbs function is negative, the process is spontaneous, however, while the change in Gibbs function is positive, the process is nonspontaneous.
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Question 4 of 10
4. Question
For a specific reaction, choose the correct statement which applies to K, the equilibrium constant?
Correct
Equilibrium for a given reaction does now no longer depend upon the beginning concentrations and so the value of the equilibrium regular is actually regular. It does, however, depend upon the temperature of the reaction.
Incorrect
Equilibrium for a given reaction does now no longer depend upon the beginning concentrations and so the value of the equilibrium regular is actually regular. It does, however, depend upon the temperature of the reaction.
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Question 5 of 10
5. Question
Choose the correct statement which states Graham’s law of effusion?
Correct
Graham’s law of effusion (rate of effusion ∝ 1√M) states that the relative rates of effusion of gases on equal temperature and pressure are given with the aid of using the inverse ratio of the square roots of the masses of the gas particles.
Incorrect
Graham’s law of effusion (rate of effusion ∝ 1√M) states that the relative rates of effusion of gases on equal temperature and pressure are given with the aid of using the inverse ratio of the square roots of the masses of the gas particles.
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Question 6 of 10
6. Question
Which among the following dienes undergo addition with the help of the radical-chain mechanism?
Correct
Conjugated dienes (a covalent compound that contains two double bonds) undergo addition reactions and the product usually formed is 1,4 dienes.
Incorrect
Conjugated dienes (a covalent compound that contains two double bonds) undergo addition reactions and the product usually formed is 1,4 dienes.
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Question 7 of 10
7. Question
Which intermediate carbocation is more stable in pinacol -pinacolone rearrangement?
Correct
3°-carbocation (an ion with a positively charged carbon atom) is relatively stable and has been proven to go back to pinacol through the reaction withinside the presence of isotopically labeled water. A 1, 2-methyl shift generates even more stable carbonation (an ion with a positively charged carbon atom) in which the charge is delocalized by heteroatom resonance.
Incorrect
3°-carbocation (an ion with a positively charged carbon atom) is relatively stable and has been proven to go back to pinacol through the reaction withinside the presence of isotopically labeled water. A 1, 2-methyl shift generates even more stable carbonation (an ion with a positively charged carbon atom) in which the charge is delocalized by heteroatom resonance.
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Question 8 of 10
8. Question
Why the chloroform layer becomes purple when a colorless solution of potassium iodide is passed through a colorless solution of chloroform?
Correct
The iodine (I) so liberated, dissolves in the chloroform (CHCl₃), giving it a purple color.
The reaction is : 2KI + Cl2 –> 2KCl + I2 (Iodine)Incorrect
The iodine (I) so liberated, dissolves in the chloroform (CHCl₃), giving it a purple color.
The reaction is : 2KI + Cl2 –> 2KCl + I2 (Iodine) -
Question 9 of 10
9. Question
Which of the following nucleophile can be used for partial enolization 1,3-Dicarbonyl compound?
Correct
Sodium acetate (C2H3NaO2) will do partial enolization (a process that takes you from a ketone or an aldehyde to an enol or an enolate) of the 1,3-Dicarbonyl compound. A weak base like NaOH (Sodium hydroxide) and Et-O-(Ethylene oxide) will form alcohol and LDA will do complete enolization.
Incorrect
Sodium acetate (C2H3NaO2) will do partial enolization (a process that takes you from a ketone or an aldehyde to an enol or an enolate) of the 1,3-Dicarbonyl compound. A weak base like NaOH (Sodium hydroxide) and Et-O-(Ethylene oxide) will form alcohol and LDA will do complete enolization.
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Question 10 of 10
10. Question
In addition to halogen (Bromine) to an alkene, how can we isolate a bromonium in the reaction?
Correct
A Bromo-carbenium ion intermediate may be predominant instead of vicinal dibromide (Addition of Br2 to an alkene) if the alkene has a cation-stabilizing substituent like phenyl group. There is an exemplar of the isolation of the bromonium ion ([BrH2]+).
Incorrect
A Bromo-carbenium ion intermediate may be predominant instead of vicinal dibromide (Addition of Br2 to an alkene) if the alkene has a cation-stabilizing substituent like phenyl group. There is an exemplar of the isolation of the bromonium ion ([BrH2]+).